linux-kernel - Re: [PATCH v3 1/5] leds: lm3532: Fix brightness control for i2c mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190826224437.GZ52127@atomide.com>
Date:   Mon, 26 Aug 2019 15:44:37 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Dan Murphy <dmurphy@...com>, jacek.anaszewski@...il.com,
        sre@...nel.org, nekit1000@...il.com, mpartap@....net,
        merlijn@...zup.org, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/5] leds: lm3532: Fix brightness control for i2c mode

* Pavel Machek <pavel@....cz> [190826 22:14]:
> On Mon 2019-08-26 14:58:22, Tony Lindgren wrote:
> > Hi,
> > 
> > * Dan Murphy <dmurphy@...com> [190820 19:53]:
> > > Fix the brightness control for I2C mode.  Instead of
> > > changing the full scale current register update the ALS target
> > > register for the appropriate banks.
> > > 
> > > In addition clean up some code errors and random misspellings found
> > > during coding.
> > > 
> > > Tested on Droid4 as well as LM3532 EVM connected to a BeagleBoneBlack
> > > 
> > > Fixes: e37a7f8d77e1 ("leds: lm3532: Introduce the lm3532 LED driver")
> > > Reported-by: Pavel Machek <pavel@....cz>
> > > Signed-off-by: Dan Murphy <dmurphy@...com>
> > > ---
> > > 
> > > v3 - Removed register define updates - https://lore.kernel.org/patchwork/patch/1114542/
> > 
> > Looks like starting with this patch in Linux next the LCD on droid4
> > is so dim it's unreadable even with brightness set to 255. Setting
> > brightness to 0 does blank it completely though.
> > 
> > Did something maybe break with the various patch revisions or are
> > we now missing some dts patch?
> 
> Maybe missing dts patch. We should provide maximum current the LED can
> handle... 

Or i2c control is somehow broken and only als control now works?

Regards,

Tony